tarbell



UNITED STATES PATENT OFFICE.

I", TARBELL, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HIMSELF AND D. C. BICKNELL.

sAsn-rAs'rENER.

Specification of Letters Patent No. 17,910, dated July 28, 1857.

To all whom t may concern Be it known that I, F. TARBELL, of Boston, in the county of Suolk and State of Massachusetts, have invented a new and Imp-roved Sash-Fastening; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure 1 is a front view of my improvement.` Figi?, is an internal view of the fastening; the frontl plate of the casing being removed. Fig. 3 is a horizontal section of ditto; Fig. 2 showing the plane of sect-ion.

Similar letters of reference indicate corresponding parts in the several figures.

This invention consists of a new article of manufacture viz., a sash-fastener, made as hereinafter described.

To enable those skilled in the art to fully understand and construct my invent-ion I will proceed to describe it.

A represents a circular case which for general purposes need not exceed one inch and a quarter in diameter and three-eighths of an inch thick. The dimensions of the case, however, may vary as circumstances may require.

At the center of the case A a socket or tube (a) is formed. This socket or tube eX- tends entirely through the case A and forms a passage for the screw by which the case is secured in the stile of the sash.

B, represents a plate which is {it-ted within the case A. This plate has a slot (c) made through it and the socket or tube (a) passes through the slot c) in the plate forming a guide for the same. The plate has a thumb-piece attached to it, said thumb-piece extending through a slot (e) in the front plate of the case sufficiently far to allow the thumb or finger to catch readily against it.

In the plate B an oblique slot (f) is made and this slot` receives a pin (g) which is attached to a bolt C. The bolt C has a loop or yoke (la.) formed at its inner end; the loop or yoke being fitted on the tube or socket. The end of the bolt works through a slot or opening in the case A. The bolt C works back and forth horizontally,

the bolt being drawn inward as the plate B moves upward and moved outward as the plate B descends.

The plate B is suiiciently heavy to descend by its own gravity, consequently the device is self-locking, but to unfasten or draw back the bolt C the plate B must be shoved upward by placing the thumb or finger against or underneath the thumbpiece The case A should be inserted in the stile of the sash, so that its front plate will be flush with the outer surface of the stile. The end of the bolt C fits in proper recesses in the jamb or side piece of the frame or caslng.

Although the case A is shown and described as being circular, still a square or other form may be employed. The form' of the case is not essential as regards the arrangement or working of the parts. The circular form is preferable however on account of the facility with which they may be inserted flush in the stiles of sashes; a circular hole merely being required to be bored in the stile to receive the case.

I am aware that many forms of sash fastenings have been devised, and bolts have been arranged and operated in various ways. In nearly all of the fastenings however springs are employed and applied to the bolts. These springs soon get out of order, and the fastenings are rendered useless; and those in which no springs are employed have not come into general use, some being quite complicated and others liable to get out of repair.

My invention is extremely simple and as both the plate B and bolt C have a positive motion no spring being employed, there are no parts liable to get out of repair. I do not however claim, broadly, the making of a sash-fastener, without a spring. Other fasteners have been made in which the spring is dispensed with. Examples are seen in R. Fitzgeralds withdrawn application for a patent, Aug. 3, 1844, M. Delings withdrawn application, May 24C, 1853, and in the patent of W. E. Arnold, April 17, 1855, and also in the patent of Lucius Page, July 15th, 1856. None of the above devices resemble mine, and I therefore disclaim them. In none of them is there seen the Therefore I claim and desire to secure by 10 locking bolt C, moved horizontally by means Letters Patentof an obliquely-slotted plate B, the latter' x As a new article of manufacture, a sashmoving vertically, and so arranged thaft the fastener, made as herein described.

late B Wil When it is ressed down, orce gut and lock the bolt, aspherein described. l F' TARBELL To the best of my knowledge and belief, Witnesses: there has never been made a sash-fastener GILBERT STEVENS, similar to mine. NORRIS NICHOLS. 

